15.Everyone knows the earth is big,most of which is covered by water.About ninety percent of the world's water is salty and is found in our oceans and seas.But as we can't drink seawater,how can it be important?
Every part of our seas and oceans contains an amazing number of animals and fish that live at different ocean depths.Most of the different species of animals and fish depend on simple plants for their food.These simple plants called algae (海藻) drift near the surface of the ocean and use sunlight to turn carbon dioxide and water into food and oxygen.In fact,algae produce over half of the oxygen people breathe.How important seawater is!
Each plant or animal in our seas and oceans is an important link in a food chain.The algae are eaten in large amounts by microscopic animals,which are in turn consumed by larger animals.These food chains are delicately balanced.
The bad news about the food chains in the oceans is that they are under threat because of man.People once thought that the oceans were so big that it didn't matter if we dumped rubbish into them or caught huge quantities of fish and whales for food.But we now know this is not true and fish stocks in the oceans have started to drop.
Thankfully,the world is taking steps to protect the future of our oceans by introducing international agreements to protect marine habitats.Most countries have introduced fishing restrictions to protect fish stocks in the oceans and new techniques are being pioneered to cope with pollution.Finally,the importance of protecting oceans is being made known to more people.This is just the beginning of a long process to protect the oceans for our future.We depend on the oceans for fish which are an important part of the human diet.How important seawater is!
71.Which of the following statements is true?A
A.Overly fishing has caused the decrease in fish stock
B.It is very hard to break the balance of a food chain
C.An amazing number of the fish and sea animals live at the surface of the seas
D.It won't be long before the problems concerning oceans will be solved
72.What does the underlying word"delicately"mean?A
A.easily-damaged
B.hard-broken
C.simply-made
D.beautifully
73.In the past,people hold the view that the rubbishD.
A.would kill the animal in the sea
B.would change the balance of the sea.
C.would pollute the sea
D.wouldn't have a bad influence on the sea
74.Which is the best title of the passage?A
A.The importance of seawater.
B.Fishing on the oceans.
C.Importance of food chains.
D.How to deal with seawater pollution.
75.Which is not a good way to protect oceans?C
A.The use of international agreements.
B.The use of new techniques.
C.Forbidding fishing to protect fish stocks.
D.Raising people's awareness of the need to protect oceans.
分析 本文為新聞報道,文章介紹了海洋中魚量的減少,號召人們保護(hù)海洋生物.
解答 71---75 AADAC
71.答案A.推理判斷題.根據(jù)第四段But we now know this is not true and fish stocks in the oceans have started to drop可知,大量捕捉魚類肯定會造成魚類儲量的下降;故A正確.
72.答案A.詞義猜測題.delicately為副詞,意味"脆弱地,容易碎壞地".故選A.
73.答案D.推理判斷題.根據(jù)第四段中的People once thought that the oceans were so big that it didn't matter if we dumped rubbish into them or caught huge quantities of fish and whales for food.But we now know this is not true and fish stocks in the oceans have started to drop可知,人們過去以為海洋那么大,扔進(jìn)一點垃圾不會對海洋造成多大影響.故選D.
74.答案A.主旨大意題.根據(jù)文章第一段But as we can't drink seawater,how can it be important?第二段In fact,algae produce over half of the oxygen people breathe.How important seawater is!最后一段How important seawater is!可知,文章的中心思想在于海水的重要性.故選A.
75.答案C.推理判斷題.根據(jù)最后一段introducing international agreements to protect marine habitats可知,達(dá)成國際協(xié)議,保護(hù)海洋生物是措施之一,故A正確.根據(jù)Most countries have introduced fishing restrictions to protect fish stocks in the oceans and new techniques are being pioneered to cope with pollution可知,介紹新技術(shù)也是保護(hù)措施之一.故B正確.文中講的是限制捕魚,并不是禁止捕魚,故C錯誤.根據(jù)Finally,the importance of protecting oceans is being made known to more people.This is just the beginning of a long process to protect the oceans for our future可知,提升人們的意識也是保護(hù)措施之一,D正確.故選C.
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